From: Bob Breuer <breuerr@mc.net>
To: sparclinux@vger.kernel.org
Subject: Re: Badness in map_area_pte
Date: Sun, 16 Jan 2005 02:25:35 +0000 [thread overview]
Message-ID: <41E9D09F.1070704@mc.net> (raw)
In-Reply-To: <41E96A42.7090501@mc.net>
Bob Breuer wrote:
> At this point, I am guessing that some pte's allocated for the
> framebuffer are being wrongly re-used when loading the module.
>
The cg14 driver is not remapping the framebuffer, and is using the mappings
that were setup by the prom and recreated in linux from
srmmu_inherit_prom_mappings().
How can we tell vmalloc not to step on that area of memory? Is it just from
VMALLOC_START to END? Let's see, for 2.6 those are 0xfe600000 and
0xffc00000. The prom mapped the cg14 to 0xfe700000 (8MB ram) and 0xffec0000
(registers). Hmm, a bit of overlap there... And 2.4 had VMALLOC_START at
0xfe300000. So it would seem that if the total vmalloc'ed memory goes above
1 meg for me, 2.6 will have problems, but 2.4 will still be fine.
Bob
next prev parent reply other threads:[~2005-01-16 2:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-15 19:08 Badness in map_area_pte Bob Breuer
2005-01-16 2:25 ` Bob Breuer [this message]
2005-01-16 3:55 ` William Lee Irwin III
2005-01-16 4:24 ` Bob Breuer
2005-01-16 4:29 ` William Lee Irwin III
2005-02-04 21:37 ` Tom 'spot' Callaway
2005-02-05 6:07 ` David S. Miller
2005-02-05 16:30 ` Tom 'spot' Callaway
2005-02-05 18:34 ` Tom 'spot' Callaway
2005-02-05 19:48 ` David S. Miller
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